Product Description
CMT 310.530.21 Dowel Drill - 1/8" x 23/64" x 2 17/64" Right-Hand by CMT is a precision-engineered short-series boring tool designed for clean, accurate blind hole drilling in solid wood, chipboard, MDF, laminates, and coated panels. Built from high-wear solid carbide and featuring a two-flute, two-spur geometry, this 3mm diameter dowel drill delivers flat-bottom holes with minimal tearout - making it a go-to choice for furniture manufacturing, cabinet production, and CNC panel processing operations where repeatable accuracy and long tool life are essential.
Key Features
- Solid Carbide (HWM) Construction - premium super-micrograin carbide throughout the entire tool body provides exceptional wear resistance and edge retention, extending tool life even in high-volume production runs on abrasive materials like chipboard and MDF.
- Two-Flute, Two-Spur Design - the dual spurs score the material perimeter ahead of the cutting edges, producing clean bore walls and crisp, flat-bottom holes with no rough edges or fiber tearout - critical for dowel joinery and confirmat fittings.
- Right-Hand Rotation (RH) - compatible with the majority of CNC boring centers, multi-spindle boring machines, and panel processing centers configured for standard right-hand spindle rotation, simplifying setup and tooling compatibility.
- 10 x 35mm Parallel Shank with Driving Flat - the robust shank diameter provides a secure, positive-drive seating in compatible boring spindles, reducing slippage and maintaining accurate hole positioning at production speeds.
- 9mm Cutting Height - the 9mm cutting zone accommodates typical dowel and fitting depths used in panel furniture and cabinet assembly, allowing consistent blind holes without the risk of breakthrough on standard panel thicknesses.
- Short Series Profile (57.5mm Total Length) - the compact 57.5mm overall length reduces vibration and deflection during boring, contributing to tighter hole tolerances and improved surface finish inside the bore.
- Extreme Sharpenability Rating - the solid carbide construction supports an almost infinite number of resharpenings, lowering long-term tooling cost per hole across extended production cycles.
Why This Product
- For shops running multi-spindle CNC boring machines or panel processing centers, the 10 x 35mm parallel shank with driving flat ensures a positive, repeatable fit in standard boring spindles - eliminating the slippage that leads to misaligned dowel holes and rejected parts.
- The two-spur geometry is specifically engineered for blind hole applications in composite panels like chipboard, MDF, and laminates - materials that typically cause fiber lifting or delamination with lesser tooling - so finished panels go to assembly without secondary cleanup.
- Solid carbide construction rated for extreme resharpenability means this dowel drill can be reconditioned rather than replaced, making it a cost-effective long-term investment for high-throughput cabinet and furniture production environments.
- The short-series 57.5mm total length is purpose-built for the tight spindle clearances found in multi-spindle boring heads, giving CNC operators a tool that fits the machine without custom adapters or compromised rigidity.
Specifications
- Manufacturer Part Number: 310.530.21
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Series: Short Series
- Diameter: 3mm (1/8")
- Cutting Height: 9mm (23/64")
- Total Length: 57.5mm (2 17/64")
- Shank: 10 x 35mm
- Number of Flutes: 2
- Number of Spurs: 2
- Blade Material: HWM Solid Carbide
- Rotation: Right-Hand (RH)
- Sharpenability: Extreme
Approved Applications
- Chipboard
- MDF
- HDF
- Hardwood
- Softwood
- Plywood
- Laminates
- Coated Panels
- Plastics
Compatible Machines
- Multi-Spindle CNC Boring Machine
- CNC Boring Center
- Panel Processing Center
- Boring Machine with Adapter or Chuck
Frequently Asked Questions
What shank size does the CMT 310.530.21 use, and will it fit my boring machine?
This dowel drill uses a 10 x 35mm parallel shank with a driving flat. It is designed for use in multi-spindle CNC boring machines, CNC boring centers, and panel processing centers that accept this standard shank format. It can also be used in boring machines equipped with a compatible adapter or chuck.
Is this drill suitable for drilling blind holes in MDF and laminated panels?
Yes. The two-flute, two-spur design is specifically engineered for blind hole boring in MDF, chipboard, laminates, and coated panels. The precision-ground spurs score the material perimeter before the cutters engage, which prevents surface tearout and delamination on finished panel faces.
Can this dowel drill be resharpened after heavy use?
Yes. The tool carries an Extreme sharpenability rating, which reflects the solid carbide (HWM) construction. Solid carbide tools can be professionally resharpened many times over their service life, reducing the cost per hole compared to non-resharpenable tooling in high-volume production settings.
What is the difference between a short-series dowel drill and a standard-length version?
Short-series dowel drills like the CMT 310.530.21 have a reduced total length - 57.5mm in this case - compared to standard or long-series equivalents. The shorter length reduces overhang from the spindle, which minimizes vibration and deflection during boring. This results in tighter hole tolerances and is especially important in multi-spindle heads where spindle clearances are limited.
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